forked from KolibriOS/kolibrios
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
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/* Basic struct timeval utilities.
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Copyright (C) 2011 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "config.h"
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/* On some systems (such as WindISS), you must include <sys/types.h>
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to get the definition of "time_t" before you include <time.h>. */
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#include <sys/types.h>
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# ifdef HAVE_TIME_H
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# include <time.h>
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# endif
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# endif
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#endif
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#include "timeval-utils.h"
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/*
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@deftypefn Extension void timeval_add (struct timeval *@var{a}, @
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struct timeval *@var{b}, struct timeval *@var{result})
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Adds @var{a} to @var{b} and stores the result in @var{result}.
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@end deftypefn
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*/
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void
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timeval_add (struct timeval *result,
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const struct timeval *a, const struct timeval *b)
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{
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result->tv_sec = a->tv_sec + b->tv_sec;
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result->tv_usec = a->tv_usec + b->tv_usec;
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if (result->tv_usec >= 1000000)
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{
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++result->tv_sec;
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result->tv_usec -= 1000000;
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}
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}
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/*
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@deftypefn Extension void timeval_sub (struct timeval *@var{a}, @
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struct timeval *@var{b}, struct timeval *@var{result})
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Subtracts @var{b} from @var{a} and stores the result in @var{result}.
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@end deftypefn
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*/
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void
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timeval_sub (struct timeval *result,
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const struct timeval *a, const struct timeval *b)
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{
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result->tv_sec = a->tv_sec - b->tv_sec;
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result->tv_usec = a->tv_usec - b->tv_usec;
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if (result->tv_usec < 0)
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{
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--result->tv_sec;
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result->tv_usec += 1000000;
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}
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}
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